package lab02.test36;

public class Postgraduate extends Student{
    @Override
    String calGrade() {
        double avg=calAverage();
        if(avg>=90 && avg<=100)
            grade="优秀";
        else if(avg>=80 && avg<90)
            grade="良好";
        else if(avg>=70 && avg<80)
            grade="一般";
        else if(avg>=60 && avg<70)
            grade="及格";
        else
            grade="不及格";

        return grade;
    }
}